"Laugh in my face, huh?" the Doctor answers, a crooked smile pulling at his features, making it very difficult to be stern.

"Alright, there may have been a few scrapes," he admits, then points out quickly, "But I know what I'm doing." Which is also debatable, of course, but he does have a slightly better frame of reference than Charley does.

"Right here," he adds, going around a boulder, and suddenly getting the TARDIS in sight. Slightly different than she's used, of course - bigger, cleaner, different coloured sign - but unmistakably the TARDIS.